Is increasing ice crystal sedimentation velocity in geoengineering simulations a good proxy for cirrus cloud seeding?

Gasparini, Blaž; Münch, Steffen; Poncet, Laure; Feldmann, Monika; Lohmann, Ulrike

doi:https://doi.org/10.5194/acp-17-4871-2017

Articles | Volume 17, issue 7

https://doi.org/10.5194/acp-17-4871-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

The Geoengineering Model Intercomparison Project (GeoMIP):...

https://doi.org/10.5194/acp-17-4871-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 17, issue 7

Research article

|

13 Apr 2017

Research article |

| 13 Apr 2017

Is increasing ice crystal sedimentation velocity in geoengineering simulations a good proxy for cirrus cloud seeding?

Blaž Gasparini, Steffen Münch, Laure Poncet, Monika Feldmann, and Ulrike Lohmann

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Final revised paper (published on 13 Apr 2017)
Supplement to the final revised paper
Preprint (discussion started on 14 Dec 2016)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Review', Anonymous Referee #1, 10 Jan 2017
RC2: 'Review of Gasparini et al.', Anonymous Referee #2, 12 Jan 2017
RC3: 'Review of Gasparini et al.', Anonymous Referee #3, 17 Jan 2017
AC1: 'Author's response', Blaz Gasparini, 23 Mar 2017

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Blaž Gasparini on behalf of the Authors (23 Mar 2017) Author's response Manuscript

ED: Publish subject to technical corrections (24 Mar 2017) by Ben Kravitz

AR by Blaž Gasparini on behalf of the Authors (24 Mar 2017) Manuscript

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Short summary

Cirrus clouds have, unlike other cloud types, a warming impact on climate. Decreasing their frequency therefore leads to a cooling effect. Cirrus ice crystals grow larger when formed on solid aerosols, inducing a shorter cloud lifetime. We compare simplified simulations of stripping cirrus out of the sky with simulations of seeding by aerosol injections. While we find the surface climate responses to be similar, the changes in clouds and cloud properties differ significantly.